Process for manufacturing cement.



MAXIMIIJI' N Tasman; oi 'nan znuinc, GERMANY, AssIGNon T PUTNA'MDEVELOP- No Drawing.

To all whom it may concern:

Be itknown that I, Maximilian): Tuna!- nor'n, a'subject of the (xerman .Iumperor, and 21..1Qbld611tof the city of Harzburg, Bruns- Wick, Germany, have invented a certain new and useful Process for Manufacturing Cement, of which the following is a specification.

This invention relates to the process of manufacturing cement. from furnace slag and has-forits object to produce a better and more uniform cement than has heretofore been produced from furnace slag.

Nearly-all furnace slag contains acertain percentage of sulfur, which varies according to the quality of.t-he ore treated, and coal used in. the furnace, audit is necessary to eliminate the sulfur in order. to produce cement of good grade and quality.

I remove asfar as possible the sulfur from the slag, as follows: I first break up the "molten slag into small molten globules by any Well known means, and 'at the same time, While the sla is broken up into small particles, I add acids diluted with Water or dilute acid solutions of solid materials, and by this means cause the diluted acid or acid solutions to be intimately mingledwith the slag which has been broken up into the molten globules. The acids attack the sulfur and cause it to be thrown off in the form of gas. The amount of acid used I vary according to the percentage of sulfur contained in the slag. I have found hoW- ever, that a slight excess of acid is not in any Way detrimental to the cement produced. Dilute acid has the property of dissolving certain solid substances, as for instance gypsum, and these soluble substances I add to my acid solution before introducing it intothe slag. I have also found by my experiments, that when such acid solution is brought into contact with the slag which has been broken up into the small molten glob-.

ules, that the acid combines therewith and deposits the solid n'iaterials Which it formerly held in solution in the form of an envelop or coating over each molten globule of slag, and that I can determine the thickness-of thisenvelop or coating over each molten globule of the slag, by the concentraiv Specification of Letters Patent.

Application filed October 3 I :MENT conrnnr, A- oonrojnarionorunw YORK.

PROCESS FOB lilIAIIUFAClTU'RING' CEMENT.

Patented Sept. 2s, moo.

Serial No. 400,140.

and the amount of solid materials dissolved therein. I have also found that the enveb ops deposited on the molten globules of coment, prevent them from reuniting into a solid mass when they again come into con tact with eachother, and leave the slag in a granular condition, in which state it is more easily pulverized or ground than is the case Where it is reunited into a solid mass.

I have also found that in order to produce good. cement from furnace slag, it is necessary that thcslag should be uniformly cooled throughout the mass; I have also found thatthe rapidity with which the slag is cooled is determined by the thickness of the envelop deposited. upon the globules, and that the time required for cooling diminishes as the thickness of the envelop is increased, and increases as the thickness of the envelop is decreased, and that by means. of a separation of.the globu s of cement by the envelops deposited thereon, that I am able. to uniformly cool the whole mass of slag, so that the cement will be of substantially uniform quality throughout. the mass.

As I can determine the thickness of the envelop by the means stated, I am able to accurately determinethelength of time required for cooling the slag, and thereby de termine the quality of the cement produced which varies according to the duration of .the cooling" operation. After the slag. reated as I have described, has been thoroughly cooled, I pulverize or grind it t a fine powder by any well known means, and it is then ready for use.

Having described my process, what. I

from furnace slag which consists in break' ing up the molten slag into small particles and then adding thereto, While the slag is in a molten condition and separated into small particles, foreign matter which will cause an envelop to be deposited about the particles of slag.

Signed at New York city, in the county of New York, and State of New York, this 22nd day of October A. D. nineteen hundred and seven.

' MAXIMILIAN TREMBOUR. Witnesses OTTO LINN,

Dorm BECK. 

